Lens driving apparatus, and camera module and optical device comprising same

Abstract

One embodiment comprises: a substrate; a housing comprising a first side part and second side part facing each other and a third side part and fourth side part facing each other; a bobbin arranged inside the housing; a first coil arranged on the bobbin; and a magnet arranged in the housing, wherein the substrate comprises a second coil facing the magnet, the magnet comprises a first magnet arranged on the first side part of the housing, a second magnet arranged on the second side part of the housing, and a third magnet arranged on the third side part of the housing, the second coil comprises a first coil unit facing the first magnet, a second coil unit facing the second magnet, and a third coil unit facing the third magnet, the first to third coil units each comprises a line having a plurality of turns, and the width of the line of the third coil unit is narrower than the width of the line of the first coil unit.

The invention claimed is: 
     
       1. A lens moving apparatus comprising:
 a board; 
 a housing comprising a first side portion and a second side portion opposite each other and a third side portion and a fourth side portion opposite each other; 
 a bobbin disposed in the housing; 
 a first coil disposed at the bobbin; and 
 a magnet disposed at the housing, wherein 
 the board comprises a second coil opposite the magnet, 
 the magnet comprises a first magnet disposed at the first side portion of the housing, a second magnet disposed at the second side portion of the housing, and a third magnet disposed at the third side portion of the housing, 
 the second coil comprises a first coil unit opposite the first magnet, a second coil unit opposite the second magnet, and a third coil unit opposite the third magnet, 
 each of the first to third coil units comprises a line having a plurality of turns, and 
 a width of the line of the third coil unit is less than a width of the line of the first coil unit. 
 
     
     
       2. The lens moving apparatus according to  claim 1 , wherein a number of turns of the line of the third coil unit is greater than a number of turns of the line of the first coil unit. 
     
     
       3. The lens moving apparatus according to  claim 1 , wherein a width of the third coil unit is equal to a width of the first coil unit. 
     
     
       4. The lens moving apparatus according to  claim 1 , wherein a width of the third coil unit is greater than a width of the first coil unit. 
     
     
       5. The lens moving apparatus according to  claim 1 , wherein each of the first to third coil units comprises a spiral pattern or an oval pattern. 
     
     
       6. The lens moving apparatus according to  claim 1 , wherein
 each of the first to third coil units comprises a first layer and a second layer disposed on the first layer, and 
 a width of the line of each of the first layer and the second layer of the third coil unit is less than a width of the line of each of the first layer and the second layer of the first coil unit. 
 
     
     
       7. The lens moving apparatus according to  claim 6 , wherein each of the first to third coil units comprises at least one via configured to interconnect the first layer and the second layer. 
     
     
       8. The lens moving apparatus according to  claim 6 , wherein the first coil unit comprises a plurality of first lines arranged in the first region in a direction from the first side to the second side, the second coil unit comprises a plurality of second lines arranged in the second region in the direction from the first side to the second side, and the third coil unit comprises a plurality of third lines arranged in the third region in a direction from the third side to the fourth side. 
     
     
       9. The lens moving apparatus according to  claim 8 , wherein a width of each of the first lines is greater than a distance between the first lines, a width of each of the second lines is greater than a distance between the second lines, and a width of each of the third lines is greater than a distance between the second lines. 
     
     
       10. The lens moving apparatus according to  claim 6 , wherein a first length of each of the first and second coil units is equal to a second length of the third coil unit, and
 wherein the first length is a distance between opposite outermost ends of each of the first and second coil units, and the second length is a distance between the outermost ends of the third coil unit. 
 
     
     
       11. The lens moving apparatus according to  claim 1 , wherein the width of the line of the first coil unit and a width of the line of the second coil unit are equal to each other. 
     
     
       12. The lens moving apparatus according to  claim 11 , wherein a thickness of the first coil unit and a thickness of the second coil unit are equal to each other. 
     
     
       13. The lens moving apparatus according to  claim 1 , wherein
 the second coil comprises a first side and a second side opposite each other and a third side and a fourth side opposite each other, 
 the board comprises an opening, and 
 the board comprises a first region located between the first side and the opening, the first coil unit being disposed in the first region, a second region located between the second side and the opening, the second coil unit being disposed in the second region, and a third region located between the third side and the opening, the third coil unit being disposed in the third region. 
 
     
     
       14. The lens moving apparatus according to  claim 1 , wherein thicknesses of the first to third coil units is equal to each other. 
     
     
       15. The lens moving apparatus according to  claim 14 , wherein a width of the line of each of the first to third coil units is less than the thickness of each of the first to third coil units. 
     
     
       16. The lens moving apparatus according to  claim 1 , wherein each of a ratio of the width of the line of the third coil unit to the width of the line of the first coil unit and a ratio of the width of the line of the third coil unit to the width of the line of the second coil unit is 1:1.25 to 1:1.5. 
     
     
       17. The lens moving apparatus according to  claim 1 , comprising a dummy member disposed at the fourth side portion of the housing. 
     
     
       18. A camera module comprising:
 a lens; 
 the lens moving apparatus according to  claim 1 ; and 
 an image sensor.